CWB WELDING INSPECTOR TEST PAPER QUESTIONS AND
ANSWERS 2025/2026
✔✔Ozone - ✔✔formed by UV light emitted from the air interacting with the oxygen; has
pungent smell and respiratory irritant
✔✔How to control ozone - ✔✔changing the consumable or the welding procedure
✔✔Ozone is problem on - ✔✔GTAW, GMAW on aluminum, SS
✔✔Lockout/Tagout - ✔✔used to de-energize or isolate energy sources
✔✔Fire Triangle - ✔✔diagram to understand the aspect of fire and explosions
✔✔Requirements to start a fire - ✔✔fuel, oxygen, and source of heat or ignition
✔✔Class B (fire) - ✔✔flammable liquids; not efficient to handle the high temp cooking oil
and grease fires in kitchen
✔✔Class K (fire) - ✔✔Oil and grease
✔✔Class A (fire) - ✔✔ordinary combustibles; wood or paper
✔✔Class C - ✔✔Live electrical equipment
✔✔Class D - ✔✔combustible metals
✔✔Confined Space - ✔✔fully or partially enclosed space
✔✔Confined Space - ✔✔not designed or intended for continuous occupancy
✔✔Confined Space - ✔✔has limited or restricted access of egress or an internal
configuration that can complicate first aid
✔✔Confined Space - ✔✔atmospheric hazard may occur due to construction, location,
content, type of work
✔✔Hazards of confined space - ✔✔Atmosphere: oxygen deficient; oxygen enriched;
flammable; toxic
✔✔Hazards of confined space - ✔✔Entry and exit points - may prevent easy accessor
quick escape
, ✔✔Hazards of confined space - ✔✔Working Surfaces - slippery, sloped, uneven,
elevated, irregularly shaped
✔✔Hazards of confined space - ✔✔Noise/vibrations - intensified w/in the confined
space
✔✔Hazards of confined space - ✔✔temperature, residual chemicals, animals and
insects, ventilation systems
✔✔Confined space procedure - ✔✔shall develop prior entering the confined space
✔✔Hot work permit - ✔✔cover any activity that involves open flames or produces heat
or spark
✔✔Confined space entry permits - ✔✔cover any activity to take place within a
designated confined space
✔✔Voltage reduction device - ✔✔designed to reduce the secondary voltages to below
specific levels when the welding equipment is not in used
✔✔Voltage reduction device - ✔✔minimize the chance of receiving an electric shock if
contact occurs with the welding secondary unit
✔✔With high voltages - ✔✔equipment for plasma arc welding, cutting
✔✔Electromagnetic fields and high-frequency voltage - ✔✔may cause interference w/
cardiac pacemakers or other implanted electromedical devices
✔✔Portable tubular scaffolding - ✔✔used as work platform due to lightweight, portable,
high strength, easily assembled & disassembled
✔✔Fall protection - ✔✔needed when working 3 m (10ft) or more above a lower level
✔✔Fall arrest system - ✔✔must prevent a worker from hitting any object or the ground;
must meet the requirements of the jurisdiction
✔✔Fall restraint system - ✔✔intended to keep workers from falling over unprotected
edges
✔✔Harness and restraints - ✔✔PPE worn while using a system
✔✔Lifelines and anchoring - ✔✔connections between workers and structures they are
working on
ANSWERS 2025/2026
✔✔Ozone - ✔✔formed by UV light emitted from the air interacting with the oxygen; has
pungent smell and respiratory irritant
✔✔How to control ozone - ✔✔changing the consumable or the welding procedure
✔✔Ozone is problem on - ✔✔GTAW, GMAW on aluminum, SS
✔✔Lockout/Tagout - ✔✔used to de-energize or isolate energy sources
✔✔Fire Triangle - ✔✔diagram to understand the aspect of fire and explosions
✔✔Requirements to start a fire - ✔✔fuel, oxygen, and source of heat or ignition
✔✔Class B (fire) - ✔✔flammable liquids; not efficient to handle the high temp cooking oil
and grease fires in kitchen
✔✔Class K (fire) - ✔✔Oil and grease
✔✔Class A (fire) - ✔✔ordinary combustibles; wood or paper
✔✔Class C - ✔✔Live electrical equipment
✔✔Class D - ✔✔combustible metals
✔✔Confined Space - ✔✔fully or partially enclosed space
✔✔Confined Space - ✔✔not designed or intended for continuous occupancy
✔✔Confined Space - ✔✔has limited or restricted access of egress or an internal
configuration that can complicate first aid
✔✔Confined Space - ✔✔atmospheric hazard may occur due to construction, location,
content, type of work
✔✔Hazards of confined space - ✔✔Atmosphere: oxygen deficient; oxygen enriched;
flammable; toxic
✔✔Hazards of confined space - ✔✔Entry and exit points - may prevent easy accessor
quick escape
, ✔✔Hazards of confined space - ✔✔Working Surfaces - slippery, sloped, uneven,
elevated, irregularly shaped
✔✔Hazards of confined space - ✔✔Noise/vibrations - intensified w/in the confined
space
✔✔Hazards of confined space - ✔✔temperature, residual chemicals, animals and
insects, ventilation systems
✔✔Confined space procedure - ✔✔shall develop prior entering the confined space
✔✔Hot work permit - ✔✔cover any activity that involves open flames or produces heat
or spark
✔✔Confined space entry permits - ✔✔cover any activity to take place within a
designated confined space
✔✔Voltage reduction device - ✔✔designed to reduce the secondary voltages to below
specific levels when the welding equipment is not in used
✔✔Voltage reduction device - ✔✔minimize the chance of receiving an electric shock if
contact occurs with the welding secondary unit
✔✔With high voltages - ✔✔equipment for plasma arc welding, cutting
✔✔Electromagnetic fields and high-frequency voltage - ✔✔may cause interference w/
cardiac pacemakers or other implanted electromedical devices
✔✔Portable tubular scaffolding - ✔✔used as work platform due to lightweight, portable,
high strength, easily assembled & disassembled
✔✔Fall protection - ✔✔needed when working 3 m (10ft) or more above a lower level
✔✔Fall arrest system - ✔✔must prevent a worker from hitting any object or the ground;
must meet the requirements of the jurisdiction
✔✔Fall restraint system - ✔✔intended to keep workers from falling over unprotected
edges
✔✔Harness and restraints - ✔✔PPE worn while using a system
✔✔Lifelines and anchoring - ✔✔connections between workers and structures they are
working on
